made of high quality materials &comma; carefully crafted &comma; fluid resistance is small &comma; light weight &comma; tightness and reliable &comma; applicable to a wide range of features &comma; operational aspects &comma; opening and closing rapidly &comma; fully open to fully closed only rotated 90 °ApplicationsPetroleum&comma; Chemical&semi;Power Generation&comma; PaProduct DescriptionThe ball valve is a maual valve&comma;mainly used to truncate the channel and device media can also be used for the regulation and control of fluid&period; The passing diameter is from several millimeters to a few meters &comma; which can be applied from high vacuum to high pressure&period;Advanced design&comma; all parts are per&semi;Various Water Supply Systems&semi; Sewage Treatment &comma; etc&period;